Purple Loosestrife (Lythrum salicaria) - Fact sheet discusses field recognition, habitat, history of introduction and spread, biology, and control measures. Lythrum salicaria - Several photographs and information about Purple Loosestrife. A Close-up View of the Beautiful Invader Purple Loosestrife - Photographic study by Brian Johnston of Lythrum salicaria with fine images of the plant at a variety of different magnifications. Purple Loosestrife (Lythrum salicaria) - Photograph and general information on this invasive weed of wet places, its description, growth habit, management and identification. Lythrum salicaria (Purple Loosestrife) - Fact sheet provided by J. Bender of the Nature Conservancy's Global Invasive Species Team. Lythrum lineare - Wand Lythrum. Lythrum virgatum - European Wand Loosestrife. Lythrum salicaria - Purple Loosestrife - Profile from PLANTS database: photographs, classification, distribution in the U.S., status as a weed under state laws, and related links.